Thermal overstability of hydromagnetic surface waves.
Abstract
We investigate the effects of radiative heat losses and thermal conductivity on the hydromagnetic surface waves along a magnetic discontinuity in a plasma of infinite electrical conductivity. We show that the effects of radiative heat losses on such surface waves are appreciable only when values of the plasma pressure on the two sides of the discontinuity are substantially different. Overstability of a surface wave requires that the medium in which it gives larger first-order compression should satisfy the criterion of Field (1965). Possible applications of the study to magnetic discontinuities in solar corona are briefly discussed.
- Publication:
-
Solar Physics
- Pub Date:
- September 1987
- DOI:
- 10.1007/BF00206422
- Bibcode:
- 1987SoPh..110..255J
- Keywords:
-
- Magnetohydrodynamic Waves;
- Plasma Conductivity;
- Plasma Density;
- Radiative Heat Transfer;
- Surface Waves;
- Thermal Stability;
- Plasma Compression;
- Plasma Pressure;
- Solar Corona;
- Solar Magnetic Field;
- Plasma Physics;
- Thermal Conductivity;
- Electrical Conductivity;
- Surface Wave;
- Heat Loss;
- Radiative Heat;
- Hydromagnetic Waves:Plasma;
- Plasma:Hydromagnetic Waves;
- Plasma:Radiative Transfer;
- Radiative Transfer:Plasma